Question

From the following, Identify the substances which turn Red litmus paper blue :

Water
Lime water
Salt solution
Soap solution
Vinegar​

Answer 1

Answer:

lime water and soap solution

Explanation:

In an alkaline solution, red litmus paper turns blue

Pure water is neither acidic or basic; it is neutral.

Limewater is the common name for a dilute aqueous solution of calcium hydroxide, which is alkaline

salt solution is acidic or basic depending upon composition. Salts that are from strong bases and weak acids do hydrolyze, which gives it a pH greater than 7. Salts of weak bases and strong acids do hydrolyze, which gives it a pH less than 7.

Soap is a combination of a weak acid (fatty acids) and a strong base (lye), which results in basic solution

Vinegar is acidic